Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
  • C08G77/12—Polysiloxanes containing silicon bound to hydrogen
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
  • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
  • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/80—Siloxanes having aromatic substituents, e.g. phenyl side groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
  • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L23/00—Details of semiconductor or other solid state devices
  • H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
  • H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
  • H01L23/293—Organic, e.g. plastic
  • H01L23/296—Organo-silicon compounds
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
  • H01L2924/0001—Technical content checked by a classifier
  • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
  • H01L33/52—Encapsulations
  • H01L33/56—Materials, e.g. epoxy or silicone resin

Definitions

• the present application relates to a curable composition and its use.
• LEDs Light emitting diodes
• LEDs are devices that are utilized in various fields such as light sources and lighting of display devices.
• Patent Documents 1 to 3 propose techniques for improving the above problems.
• the sealing material known so far is not enough in heat resistance and light resistance.
• Patent Document 1 Japanese Patent Application Laid-Open No. 11-274571
• Patent Document 2 Japanese Patent Laid-Open No. 2001-196151
• Patent Document 3 Japanese Patent Laid-Open No. 2002-226551
• the present application provides a curable composition and its use.
• Exemplary curable compositions may include components that are cured by hydrosilylation, such as reaction of aliphatic unsaturated bonds with hydrogen atoms bonded to silicon atoms.
• the curable composition may comprise a mixture of crosslinked polyorganosiloxanes containing aliphatic unsaturated bonds and polyorganosiloxanes comprising hydrogen atoms bonded to silicon atoms.
• M unit refers to a so-called monofunctional siloxane unit that may be represented by a formula (R 3 SiO 1/2 ) in the industry
• D unit refers to a formula (R 2 SiO 2 in the industry).
• / 2 means so-called difunctional siloxane units that may be represented by the term
• T unit means so-called trifunctional siloxane units that may be represented by the formula (RSiO 3/2 ) in the industry
• Q unit may refer to a so-called tetrafunctional siloxane unit that may be represented by the formula (SiO 4/2 ).
• R is a functional group bonded to silicon (Si), and may be, for example, a hydrogen atom, an epoxy group, or a monovalent hydrocarbon group.
• the curable composition includes an aliphatic unsaturated bond and may include a mixture of crosslinked polyorganosiloxanes.
• crosslinked polyorganosiloxane includes essentially T or Q units, but the ratio of D units to total D, T, and Q units (D / (D + T + Q)) is zero or more. While, it may mean a polyorganosiloxane of less than 0.7. In the crosslinked polyorganosiloxane, the ratio (D / (D + T + Q)) may be 0.65 or less, 0.6 or less, 0.55 or less, 0.5 or less, 0.45 or less, 0.4 or less, or 0.35 or less in another example.
• the mixture of crosslinked polyorganosiloxanes may comprise high refractive polyorganosiloxanes.
• the term “high refractive polyorganosiloxane” may refer to a polyorganosiloxane containing an aryl group in a molecule or more in a predetermined ratio.
• the high refractive polyorganosiloxane is a ratio (Ar / Si) of the number of moles (Ar) of all aryl groups to the number of moles (Si) of all silicon atoms of 0.25 or more, 0.3 or more, 0.4 or more, 0.5 or more or 0.6. Or polyorganosiloxane of 0.65 or more.
• the upper limit of the ratio (Ar / Si) in the high refractive polyorganosiloxane may be, for example, 1.5, 1.0 or 0.9.
• aryl group includes a compound having a structure in which a benzene ring or two or more benzene rings are linked, or a structure condensed or bonded while sharing one or two or more carbon atoms or It may mean a monovalent residue derived from the derivative.
• the range of the aryl group referred to herein may include a functional group commonly referred to as an aryl group as well as a so-called aralkyl group or an arylalkyl group.
• the aryl group may be, for example, an aryl group having 6 to 25 carbon atoms, 6 to 21 carbon atoms, 6 to 18 carbon atoms, or 6 to 12 carbon atoms.
• aryl group examples include phenyl group, dichlorophenyl, chlorophenyl, phenylethyl group, phenylpropyl group, benzyl group, tolyl group, xylyl group or naphthyl group.
• the mixture of crosslinked polyorganosiloxanes includes M units of the following formula A and M units of the following formula B, respectively, wherein M is the sum of the number of moles (A + B) of the M units of the formulas A and B, respectively.
• the first crosslinked polyorganosiloxane having the molar number (B) of units (B / A + B) of 0.05 to 0.7, 0.05 to 0.6, 0.05 to 0.5, 0.05 to 0.4, 0.05 to 0.35 or 0.1 to 0.35, and the ratio (B / (A + B)) may be a mixture of second crosslinked polyorganosiloxanes having from 0.3 to 1.0, 0.4 to 1.0, 0.5 to 1.0, 0.6 to 1.0 or 0.65 to 0.95.
• the ratio (B / (A + B)) in the first crosslinked polyorganosiloxane and the ratio (B / (A + B)) in the second crosslinked polyorganosiloxane may be different from each other
• R a is an alkyl group and R b is an alkenyl group.
• alkyl group may mean an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
• the alkyl group may be linear, branched or cyclic.
• the alkyl group may be optionally substituted with one or more substituents.
• alkenyl group may refer to an alkenyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms.
• the alkenyl group may be linear, branched, or cyclic, and may be optionally substituted with one or more substituents.
• the first crosslinked polyorganosiloxane is a high refractive crosslinked polyorganosiloxane having an average composition formula of Formula 1
• the second crosslinked polyorganosiloxane is a high refractive crosslinked polyorganosiloxane having an average composition formula of Formula 2.
• R 1 to R 3 are each independently an epoxy group or a monovalent hydrocarbon group, at least one of R 1 to R 3 is an alkenyl group, at least one of R 1 to R 3 is an aryl group, and R is hydrogen or It is a monovalent hydrocarbon group, a, b, c, d and e are each independently 0 or a positive number, c / (c + d) is 0.6 or more and e / (c + d) is 0.2 or less.
• R 4 to R 5 are each independently an epoxy group or a monovalent hydrocarbon group, at least one of R 4 to R 5 is an alkenyl group, at least one of R 4 to R 5 is an aryl group, and R is hydrogen or It is a monovalent hydrocarbon group, f, g, h, i, and j are each independently 0 or a positive number, h / (h + i) is 0.6 or more, j / (h + i) is 0.2 or less.
• polyorganosiloxane having a specific average composition formula is a polyorganosiloxane that is a single component represented by the average composition formula or, of course, a mixture of two or more components, and taking the average of the composition of the components of the mixture. It may be a polyorganosiloxane in the form of a mixture represented by the average composition formula.
• epoxy group may refer to a cyclic ether having three ring constituent atoms or a monovalent moiety derived from a compound containing the cyclic ether.
• examples of the epoxy group include glycidyl group, epoxyalkyl group, glycidoxyalkyl group or alicyclic epoxy group.
• the alicyclic epoxy group may mean a monovalent moiety derived from a compound containing an aliphatic hydrocarbon ring structure, wherein the two carbon atoms forming the aliphatic hydrocarbon ring also include an epoxy group.
• an alicyclic epoxy group having 6 to 12 carbon atoms can be exemplified, for example, a 3,4-epoxycyclohexylethyl group or the like can be exemplified.
• the term "monohydric hydrocarbon group” may refer to a compound consisting of carbon and hydrogen or a monovalent moiety derived from a derivative of such a compound.
• the monovalent hydrocarbon group may contain 1 to 25 carbon atoms.
• an alkyl group, an alkenyl group, an alkynyl group, etc. can be illustrated.
• alkynyl group may mean an alkynyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified.
• the alkynyl group may be linear, branched, or cyclic, and may be optionally substituted with one or more substituents.
• Substituents which may be optionally substituted with an epoxy group or a monovalent hydrocarbon group herein include epoxy groups such as halogen, glycidyl group, epoxyalkyl group, glycidoxyalkyl group or alicyclic epoxy group such as chlorine or fluorine, acryloyl group, Methacryloyl group, isocyanate group, thiol group or monovalent hydrocarbon group and the like can be exemplified, but is not limited thereto.
• R 1 to R 3 may be an alkenyl group.
• the alkenyl group has a ratio (Ak / Si) of the number of moles (Ak) of the alkenyl group to the number of moles (Si) of the total silicon atoms included in the polyorganosiloxane of Formula 1 of 0.03 to 0.4 or 0.03 to 0.35 May be present in an amount such that By controlling the molar ratio (Ak / Si) to 0.03 or more, the reactivity can be properly maintained, and the phenomenon in which the unreacted component leaks out to the surface of the cured product can be prevented. In addition, by adjusting the molar ratio (Ak / Si) to 0.4 or 0.35 or less, it is possible to maintain excellent hardness, crack resistance and thermal shock resistance of the cured product.
• R 1 to R 3 may be an aryl group.
• the aryl group is a ratio (Ar / Si) of the number of moles (Ar) of the aryl group to the number of moles (Si) of all the silicon atoms contained in the polyorganosiloxane of the formula of Formula (1) of the high refractive polyorganosiloxane It can be adjusted within a range such as the molar number ratio (Ar / Si).
• a, b, c and d represent the molar ratio of each siloxane unit, and when the sum is converted into 1, a is 0 to 0.7, 0 to 0.6, 0 to 0.5, 0 to 0.4 or 0 To 0.35, b is 0 to 0.5, 0 to 0.4, 0 to 0.3, 0 to 0.2 or 0 to 0.1, c is 0 to 0.85, 0.1 to 0.85, 0.2 to 0.85, 0.3 to 0.85, 0.4 to 0.85, 0.5 To 0.85 or 0.6 to 0.85, and d is 0 to 0.7, 0 to 0.6, 0 to 0.5, 0 to 0.4, 0 to 0.3, 0 to 0.2 or 0 to 0.1.
• (A + b) / (a + b + c + d) is 0.1 to 0.8, 0.1 to 0.7, 0.1 to 0.6, 0.1 to 0.5, 0.1 to 0.1 in order to maximize the strength, crack resistance and thermal shock resistance of the cured product.
• 0.4 or 0.15 to 0.4 can be adjusted.
• c / (c + d) may be adjusted to be 0.6 or more, 0.65 or more, 0.7 or more, 0.8 or more or 0.9 or more.
• the upper limit of c / (d + c) in the above is not particularly limited, and may be, for example.
• e represents the amount of a condensable functional group, for example, a hydroxy group or an alkoxy group, contained in the polyorganosiloxane.
• e is 0 or a positive number.
• e / (c + d) may be determined in a range of 0.2 or less, 0.15 or less, 0.1 or less, or 0.
• R 4 to R 6 in Formula 2 may be an alkenyl group.
• the alkenyl group has a ratio (Ak / Si) of the number of moles (Ak) of the alkenyl group to the number of moles (Si) of all the silicon atoms contained in the polyorganosiloxane of the formula (2) of 0.03 to 0.4 or 0.03 to It may be present in an amount such that 0.35.
• the molar ratio (Ak / Si) to 0.03 or more, the reactivity can be properly maintained, and the phenomenon that the unreacted component leaks out to the surface of the cured product can be prevented.
• the molar ratio (Ak / Si) to 0.4 or less or 0.35 or less, it is possible to maintain excellent hardness, crack resistance and thermal shock resistance of the cured product.
• R 4 to R 6 may be an aryl group.
• the aryl group the ratio of the number of moles (Ar) of the aryl group (Ar / Si) to the total silicon atoms (Si) contained in the polyorganosiloxane of the formula of formula (2) is the mole ratio of the high refractive polyorganosiloxane ( Ar / Si).
• f, g, h and i represent the molar ratio of each siloxane unit, and when the sum is converted into 1, f is 0-0.7, 0-0.6, 0-0.5, 0-0.4 or 0 To 0.35, g is 0 to 0.5, 0 to 0.4, 0 to 0.3, 0 to 0.2 or 0 to 0.1, h is 0 to 0.85, 0.1 to 0.85, 0.2 to 0.85, 0.3 to 0.85, 0.4 to 0.85, 0.5 To 0.85 or 0.6 to 0.85, i is 0 to 0.7, 0 to 0.6, 0 to 0.5, 0 to 0.4, 0 to 0.3, 0 to 0.2 or 0 to 0.1.
• (f + g) / (f + g + h + i) is 0.1 to 0.8, 0.1 to 0.7, 0.1 to 0.6, 0.1 to 0.5, 0.1 to 0.4 or 0.15 to 0.4 can be adjusted.
• h / (h + i) may be adjusted to be 0.6 or more, 0.65 or more, 0.7 or more, 0.8 or more, or 0.9 or more.
• the upper limit of h / (h + i) is not particularly limited, and may be, for example.
• j represents the amount of a condensable functional group, for example, a hydroxyl group or an alkoxy group, contained in the polyorganosiloxane.
• j is 0 or a positive number, and for example, j / (h + i) may be determined in a range of 0.2 or less, 0.15 or less, 0.1 or less, or 0.
• the compatibility between the components of the curable composition can be maintained to form a cured product having excellent transparency after curing, and also excellent moisture resistance and the like of the cured product, and the cured product is, for example, a semiconductor When applied to an element or the like, long-term reliability of the element can also be ensured.
• the mixture of the crosslinked polyorganosiloxane may include the first crosslinked polyorganosiloxane and the second crosslinked polyorganosiloxane in an appropriate ratio, for example, 5 parts by weight based on 100 parts by weight of the first crosslinked polyorganosiloxane.
• the unit weight part may refer to the ratio of the weight between the components.
• the crosslinked polyorganosiloxane mixture may have a viscosity at 25 ° C. of at least 1000 cP or at least 2000 cP, thereby maintaining appropriately the workability before curing and the hardness characteristics after curing.
• the mixture of the cross-linked polyorganosiloxane for example, may have a weight average molecular weight (Mw) of 500 to 20,000 or 500 to 10,000.
• Mw weight average molecular weight
• weight average molecular weight may refer to a conversion value for standard polystyrene measured by Gel Permeation Chromatograph (GPC). Unless otherwise specified, the term “molecular weight” may mean a weight average molecular weight.
• the moldability before curing or the strength after curing can be effectively maintained, and the molecular weight can be adjusted to 20,000 or 10,000 or less to maintain the viscosity and the like at an appropriate level. have.
• the method for producing each crosslinked polyorganosiloxane of the mixture is not particularly limited, and conventional methods known in the art may be applied.
• the curable composition may further include a polyorganosiloxane (hereinafter referred to as polyorganosiloxane (B)) containing a hydrogen atom bonded to a silicon atom.
• the polyorganosiloxane (B) may have, for example, one, two or more hydrogen atoms bonded to silicon atoms.
• the polyorganosiloxane (B) may be, for example, a high refractive polyorganosiloxane.
• the polyorganosiloxane (B) may be solid or liquid.
• the polyorganosiloxane (B) may have a linear structure, that is, a structure consisting of only M and D units, or a structure containing T or Q units.
• the hydrogen atom may be bonded to the silicon atom present at the terminal of the linear structure.
• the polyorganosiloxane (B) may be a low molecular or monomolecular compound. Thereby, the polyorganosiloxane (B) may contain 3 to 10, 3 to 9, 3 to 8, 3 to 7, 3 to 6 or 3 to 5 silicon atoms. Can be. Such polyorganosiloxane (B) can exhibit excellent reactivity with aliphatic unsaturated bonds. In addition, it is possible to improve the crack resistance of the cured product and to maintain the gas permeability at a low level.
• the polyorganosiloxane (B) may be a crosslinking agent that crosslinks the composition by reacting with an aliphatic unsaturated bond.
• the hydrogen atom of the polyorganosiloxane (B) reacts with an aliphatic unsaturated bond such as the alkenyl group of the polyorganosiloxane (A) and / or the polyorganosiloxane (B) as described above, and crosslinks and hardens. You can.
• the ratio (H / Si) of the number of moles (Si) of all silicon atoms and the number of moles (H) of silicon atom-bonded hydrogen atoms in the polyorganosiloxane (B) is, for example, 1.0 or less, 0.9 or less, 0.8 or less, or 0.75 or less. Can be.
• the molar ratio (H / Si) may also be at least 0.1, at least 0.2, at least 0.3, at least 0.4 or at least 0.5. It is possible to maintain excellent curability in such a range and to maintain excellent crack resistance and thermal shock resistance.
• the ratio of the number of moles (Ar) of the aryl group to the number of moles (Si) of all silicon atoms contained in the polyorganosiloxane (B) (Ar / Si) Silver may be in the same range as the molar ratio (Ar / Si) of the high refractive polyorganosiloxane described above.
• the polyorganosiloxane (B) may be solid or liquid. If the polyorganosiloxane (B) is a liquid, the viscosity at 25 ° C. may be 300 mPa ⁇ s or less or 300 mPa ⁇ s or less. By controlling the viscosity of the polyorganosiloxane (B) as described above, the processability of the composition and the hardness characteristics of the cured product can be excellently maintained.
• the polyorganosiloxane (B) may, for example, have a molecular weight of less than 1,000 or less than 800.
• the lower limit of the molecular weight of the polyorganosiloxane (B) is not particularly limited, and may be 250, for example.
• polyorganosiloxane (B) all kinds of polyorganosiloxanes can be used as long as the above characteristics are satisfied.
• a compound represented by the following formula (3) or (4) can be used as the polyorganosiloxane (B).
• R in formula (3) is each independently hydrogen, an epoxy group or a monovalent hydrocarbon group, at least one of R is an aryl group, n is a number from 1 to 10.
• N in Formula 3 may be, for example, 1 to 8, 1 to 6, 1 to 4, 1 to 3, or 1 to 2.
• R 1 and R 2 in Formula 4 each independently represent a hydrogen or monovalent hydrocarbon group, and at least one of R 1 and R 2 is an aryl group.
• the content of the polyorganosiloxane (B) is a molar number (Ak) of all the aliphatic unsaturated bond-containing functional groups contained in the curable composition, for example, the alkenyl group contained in the polyorganosiloxane (A) and the polyorganosiloxane (B).
• the ratio (H / Ak) of the number of moles (H) of hydrogen atoms of the polyorganosiloxane (B) to may be selected from 0.5 to 3.0 or from 0.7 to 2.
• H / Ak By blending in such a molar ratio (H / Ak), it exhibits excellent workability and workability prior to curing, and is cured to show excellent crack resistance, hardness characteristics, thermal shock resistance and adhesion, and provides turbidity and surface stickiness under harsh conditions.
• a composition that does not cause can be provided.
• a curable composition is a polyorganosiloxane containing the hydrogen atom couple
• the curable composition includes a hydrogen atom bonded to a silicon atom, and may further include a polyorganosiloxane including silicon atoms in a range of 10 to 50 or 20 to 40.
• the polyorganosiloxane may be a low refractive polyorganosiloxane, in which case it may have an aryl group molar ratio (Ar / Si) in the above-described range.
• the number of silicon atoms included in the polyorganosiloxane may be 25 or more, 27 or more, or about 30 or more, and 38 or less or 36 or less.
• a compound is represented by, for example, Formula 3, wherein an aryl group in R, which is a monovalent hydrocarbon group, is included to satisfy the aryl group molar ratio (Ar / Si) of the low refractive polyorganosiloxane, and n is 18 to 38. It may be a compound within the range. In this case, n may be 23 or more, 25 or more, or 28 or more, and 36 or less or 34 or less.
• the content ratio of the compound in the curable composition is not particularly limited.
• the unit weight part may be a ratio of the weight between each component.
• the curable composition may further include, for example, a compound (hereinafter, Compound (C)) having an average compositional formula of the following Chemical Formula 5 as a compound containing a hydrogen atom.
• a compound hereinafter, Compound (C) having an average compositional formula of the following Chemical Formula 5 as a compound containing a hydrogen atom.
• each R is independently a monovalent hydrocarbon group, at least one of R is an aryl group, and the sum of a, b, and c (a + b + c) is 1, a is 0.3 to 0.8, and b is 0.2 to 0.7 and c is 0 to 0.5.
• the ratio (H / Si) of the number of moles (H) of silicon atom-bonded hydrogen atoms to the number of moles (Si) of all silicon atoms may be, for example, about 0.2 to 1.0 or about 0.3 to 1.0.
• the ratio (Ar / Si) of the number of moles (Ar) of the silicon atom-bonded aryl groups to the number of moles (Si) of all the silicon atoms is, for example, 0 to 0.8, 0.2 to 0.8 or 0. To about 0.7.
• the content can be suitably selected considering the ratio of the said polyorganosiloxane (B), the quantity of aliphatic unsaturated bond, etc., for example.
• the curable composition may further include, for example, a compound represented by the following formula (hereinafter, compound (D)) as another compound containing a hydrogen atom.
• compound (D) a compound represented by the following formula
• R in formula (6) is each independently hydrogen, an epoxy group or a monovalent hydrocarbon group, r is a number of 5 to 100, s is a number of 0 to 100 or 5 to 100.
• the monovalent hydrocarbon group may be, for example, a monovalent hydrocarbon group except for an aryl group.
• the ratio (H / Si) of the number of moles (H) of the silicon atom-bonded hydrogen atoms to the number of moles (Si) of the total silicon atoms contained in the compound (D) may be 0.2 to 1 or 0.3 to 1.
• the molar ratio (H / Si) can be adjusted as described above to maintain excellent curability.
• Compound (D) may also have a viscosity at 25 ° C. of 0.1 cP to 100,000 cP, 0.1 cP to 10,000 cP, 0.1 cP to 1,000 cP or 0.1 cP to 300 cP. If it has the said viscosity, it can maintain
• the ratio (Ar / Si) of the number of moles (Ar) of the silicon atom-bonded aryl groups to the number of moles (Si) of the total silicon atoms of the compound (D) may be, for example, about 0 to 0.8 or about 0 to 0.7.
• the content of the compound (D) is, for example, included in the total aliphatic unsaturated bond-containing functional group included in the curable composition, for example, the amount of the alkenyl group included in the polyorganosiloxane (A) and the polyorganosiloxane (B). It may be adjusted to an appropriate content in consideration of the amount of silicon atom-bonded hydrogen atoms.
• the curable composition may further include, for example, a linear or partially crosslinked polyorganosiloxane (hereinafter, polyorganosiloxane (E)) as a compound containing an aliphatic unsaturated bond.
• polyorganosiloxane a linear or partially crosslinked polyorganosiloxane
• the term "linear polyorganosiloxane” may mean a polyorganosiloxane composed of M units and D units, and the term “partially crosslinked polyorganosiloxane” has a sufficient linear structure derived from D units.
• a long, polyorganosiloxane in which T or Q units, for example, T units are partially introduced, for example, the ratio of D units to the total D, T and Q units contained in the polyorganosiloxane (D / (D + T + Q)) may mean a polyorganosiloxane having at least 0.7, at least 0.75, at least 0.8, or at least 0.85.
• the ratio D / (D + T + Q) may also be less than 1 or up to about 0.95.
• the polyorganosiloxane (E) may be a low refractive polyorganosiloxane or a high refractive polyorganosiloxane.
• the polyorganosiloxane (E) may contain one or more aliphatic unsaturated bonds, for example alkenyl groups.
• the polyorganosiloxane (E) is a molar ratio of the functional group (Ak) including the aliphatic unsaturated bond to the total silicon atoms (Si) contained in the polyorganosiloxane (E), for example, an alkenyl group ( Ak / Si) may include the functional group in an amount of 0.001 to 0.3.
• the molar ratio (Ak / Si) may be 0.01 or more, 0.02 or more, 0.03 or more, 0.04 or more or 0.05 or more in another example.
• the molar ratio (Ak / Si) may be 0.25 or less or 0.2 or less in another example.
• the polyorganosiloxane (E) may be low refractive polyorganosiloxane or high refractive polyorganosiloxane.
• the low refractive polyorganosiloxane is used as the polyorganosiloxane (E)
• the polyorganosiloxane (E) may have, for example, an average composition formula of the following formula (7).
• R 1 to R 3 are each independently an epoxy group or a monovalent hydrocarbon group, at least one of R 1 to R 3 is an alkenyl group, and a, c and d are each independently 0 or a positive number. And b is a positive number.
• the monovalent hydrocarbon group may be a monovalent hydrocarbon group except for an aryl group.
• R 1 to R 3 in the formula (7) is an alkenyl group, for example, an alkenyl group may be present within a range satisfying the molar ratio (Ak / Si) described above. Although not particularly limited, for example, an alkenyl group may be present at the position of R 3 .
• a, b, c and d represent the molar ratio of each siloxane unit of the polyorganosiloxane (E). If the sum (a + b + c + d) is converted to 1, a is 0.001 to 0.2, 0.01 to 0.2, 0.02 to 0.2, 0.03 to 0.2, 0.04 to 0.2 or 0.04 to 0.1, and b is 0.7 to 0.999 or 0.7 to 0.95, c may be 0 to 0.3 or more than 0, 0.2 or less, or 0.1 or more while exceeding 0, d may be 0 to 0.3, 0 to 0.2 or 0 to 0.1.
• Each siloxane unit in Formula 7 may be present, for example, such that (c + d) / (a + b + c + d) is 0 to 0.3, 0 to 0.2 or 0 to 0.1.
• b / (b + c + d) in Chemical Formula 6 may be greater than 0.7 and less than 1.
• b / (b + c + d) may be 0.7 to 0.97 or 0.65 to 0.97.
• the polyorganosiloxane (E) may be included, for example, in the ring-opening polymerization reaction of the mixture comprising cyclic polyorganosiloxane.
• the reactant includes, for example, a cyclic compound having a weight average molecular weight (Mw) of 800 or less, 750 or less or 700 or less, for example, a cyclic polyorganosiloxane, with a ratio of 7% by weight or less and 5% by weight. It may be up to% or up to 3% by weight.
• the lower limit of the ratio of the cyclic compound may be, for example, 0% by weight or 1% by weight. By adjusting the ratio, it may be possible to provide a cured product having excellent long-term reliability and crack resistance.
• the term "weight average molecular weight” may refer to a conversion value for standard polystyrene measured by Gel Permeation Chromatograph (GPC). Unless otherwise specified, the term "molecular weight” may mean a weight average
• the polyorganosiloxane (E) or a reactant comprising the same is an aliphatic unsaturated bond-containing functional group in which the area of the peak derived from the alkoxy group bonded to the silicon atom in the spectrum determined by 1 H NMR is bonded to silicon, for example, vinyl. It may be 0.01 or less, 0.005 or less or 0 with respect to the area of the peak derived from an alkenyl group such as a group. While exhibiting suitable viscosity properties in the above range, other physical properties can be maintained excellently.
• the polyorganosiloxane (E) or a reactant including the same may have an acid value of 0.02 or less, 0.01 or less, or 0 obtained by KOH titration. While exhibiting suitable viscosity properties in the above range, other physical properties can be maintained excellently.
• the polyorganosiloxane (E) or the polymerization reactant including the same may have a viscosity at 25 ° C. of at least 500 cP, at least 1,000 cP, at least 2,000 cP, and at least 5,000 cP. In this range, workability and hardness characteristics can be properly maintained.
• the upper limit of the viscosity is not particularly limited, but for example, the viscosity may be 500,000 cP or less, 400,000 cP or less, 300,000 cP or less, 200,000 cP or less, 100,000 cP or less, 80,000 cP or less, 70,000 cP or less, or 65,000 cP or less. Can be.
• the polyorganosiloxane (E) or the polymerization reactant including the same may have a molecular weight of 500 to 100,000 or 1,500 to 50,000. In this range, moldability, hardness, strength characteristics, and the like can be properly maintained.
• the polymerization reactant comprising the polyorganosiloxane (E) may be, for example, a ring-opening polymerization reactant of a mixture comprising a cyclic polyorganosiloxane.
• the mixture may further comprise a polyorganosiloxane, for example, having a cage structure or a partial cage structure or comprising T units.
• a cyclic polyorganosiloxane compound the compound represented by following formula (8) can be used, for example.
• R d and R e are each independently an epoxy group or a monovalent hydrocarbon group, and o is 3 to 6.
• the cyclic polyorganosiloxane may also include a compound of formula 9 and a compound of formula 10.
• R f and R g are epoxy groups or alkyl groups
• R h and R i are epoxy groups or monovalent hydrocarbon groups
• p is a number from 3 to 6
• q is a number from 3 to 6.
• the mixture is a polyorganosiloxane of a cage structure, for example, has a compound or partial cage structure having an average compositional formula of the formula (11), or comprises a T unit
• the compound having an average composition formula of the following Formula 12 may be further included.
• R j , R k and R m are each independently an epoxy group or a monovalent hydrocarbon group
• R 1 is an epoxy group or an alkyl group having 1 to 4 carbon atoms
• p is 1 to 3
• q is 1 to 10 to be.
• the specific types of R j to R m , the specific values of p and q, and the ratio of each component in the mixture may be determined by the structure of the desired polyorganosiloxane (E).
• a polyorganosiloxane having a desired partially crosslinked structure can be synthesized at a sufficient molecular weight.
• a target having excellent physical properties by minimizing a functional group such as an alkoxy group or a hydroxyl group bonded to a silicon atom in the polyorganosiloxane or a polymerization reaction including the same.
• the mixture may further include a compound represented by the following Chemical Formula 13.
• R n and R o are an epoxy group or a monovalent hydrocarbon group.
• the specific type of monovalent hydrocarbon group or the blending ratio in the mixture may be determined according to the desired polyorganosiloxane (E).
• reaction of each component in the mixture can be carried out in the presence of a suitable catalyst.
• the mixture may further comprise a catalyst.
• a base catalyst As a catalyst which can be contained in a mixture, a base catalyst is mentioned, for example.
• Suitable base catalysts include metal hydroxides such as KOH, NaOH or CsOH; Metal silanolate or tetramethylammonium hydroxide containing an alkali metal compound and siloxane, tetraethylammonium hydroxide or tetrapropylammonium hydroxide, and the like. Quaternary ammonium compounds and the like can be exemplified, but are not limited thereto.
• the proportion of the catalyst in the mixture may be appropriately selected in consideration of the desired reactivity and the like, for example, 0.01 to 30 parts by weight or 0.03 to 5 parts by weight based on 100 parts by weight of the total weight of the reactants in the mixture. May be included as a percentage of wealth.
• unit parts by weight means a ratio of weights between components.
• the reaction of the mixture may be carried out in the absence of a solvent or in the presence of a suitable solvent.
• a suitable solvent any reactant in the mixture, i.e., disiloxane or polysiloxane, and the like can be mixed with the catalyst appropriately, and any kind can be used as long as it does not interfere with the reactivity.
• the solvent examples include aliphatic hydrocarbon solvents such as n-pentane, i-pentane, n-hexane, i-hexane, 2,2,4-trimethylpentane, cyclohexane or methylcyclohexane; Aromatic solvents such as benzene, toluene, xylene, trimethylbenzene, ethyl benzene or methylethyl benzene, methyl ethyl ketone, methyl isobutyl ketone, diethyl ketone, methyl n-propyl ketone, methyl n-butyl ketone, cyclohexanone, Ketone solvents such as methylcyclohexanone or acetylacetone; Tetrahydrofuran, 2-methyl tetrahydrofuran, ethyl ether, n-propyl ether, isopropyl ether, diglyme,
• the reaction of the mixture for example the ring-opening polymerization reaction, can be carried out, for example, with the addition of a catalyst, for example at a reaction temperature in the range of 0 ° C to 150 ° C or 30 ° C to 130 ° C.
• the reaction time can be adjusted, for example, within the range of 1 hour to 3 days.
• the curable composition may further include a hydrosilylation catalyst.
• Hydrosilylation catalysts can be used to accelerate the hydrogensilylation reaction.
• any conventional component known in the art can be used. Examples of such a catalyst include platinum, palladium or rhodium-based catalysts.
• a platinum-based catalyst can be used, and examples of such catalysts include chloroplatinic acid, platinum tetrachloride, olefin complexes of platinum, alkenyl siloxane complexes of platinum, carbonyl complexes of platinum, and the like. May be, but is not limited thereto.
• the content of the hydrosilylation catalyst is not particularly limited as long as it is contained in a so-called catalytic amount, that is, an amount that can act as a catalyst. Typically, it may be used in an amount of 0.1 ppm to 200 ppm, preferably 0.2 ppm to 100 ppm, based on the atomic weight of platinum, palladium or rhodium.
• the curable composition may further include an tackifier in view of further improvement of adhesion to various substrates.
• Adhesion imparting agent is a component capable of improving self-adhesion to the composition or cured product, and in particular, may improve self-adhesion to metals and organic resins.
• an adhesive imparting agent 1 or more types chosen from the group which consists of alkenyl groups, such as a vinyl group, a (meth) acryloyloxy group, a hydrosilyl group (SiH group), an epoxy group, an alkoxy group, an alkoxy silyl group, a carbonyl group, and a phenyl group Or silanes having two or more functional groups; Or organic silicon compounds such as cyclic or linear siloxanes having 2 to 30 or 4 to 20 silicon atoms, and the like, but are not limited thereto.
• one kind or two or more kinds of the above-mentioned adhesion imparting agents may be further mixed and used.
• the tackifier may include an alkenyl group and an epoxy group bonded to a silicon atom, and the molar ratio (Ak / Si) of the alkenyl group (Ak) to the total silicon atoms (Si) is 0.02 to 0.5, and 0.08 to 0.5 , 0.1 to 0.5 or 0.1 to 0.4, and the molar ratio (Ar / Si) of the aryl group (Ar) to the total silicon atoms (Si) is 0.9 or less, 0.8 or less, 0.7 or less, 0.6 or less, 0.5 or less, 0.4 or less , 0.3 or less, 0.2 or less, 0.1 or less, or 0.05 or less, and the molar ratio (Ep / Si) of the epoxy group (Ep) to the total silicon atoms (Si) is in the range of 0.01 to 0.5, 0.05 to 0.5, 0.1 to 0.5, or 0.1 to 0.45. Endogenous polyorganosiloxane.
• the adhesion imparting agent may have an average composition formula of the following formula (14).
• R and R 1 to R 3 are each independently a monovalent hydrocarbon group or an epoxy group, at least one of R 1 to R 3 is an alkenyl group or an epoxy group, and a, b, c, d and e are each 0 or It is a positive number, c / (c + d) may be at least 0.3, and e / (c + d) may be at most 0.2. However, at least one of c and d may be a positive number.
• the R and R 1 to R 3 may each be the substituent except for the aryl group.
• the aryl group in Formula 12 may have a molar ratio (Ar / Si) of the aryl group described above being 0.9 or less, 0.8 or less, 0.7 or less, 0.6 or less, 0.5 or less, 0.4 or less or 0.3 or less. , 0.2 or less, 0.1 or less, or 0.05 or less.
• R 1 to R 3 may be an alkenyl group.
• the alkenyl group in Formula 14 may be included to satisfy the above-mentioned molar ratio (Ak / Si).
• at least one of R 1 to R 3 may be an epoxy group.
• the epoxy group in Formula 14 may be included to satisfy the aforementioned molar ratio (Ep / Si).
• a, b, c and d represent the molar ratio of each siloxane unit, and if the sum (a + b + c + d) is converted to 1, then a is 0.2 to 0.8, 0.3 to 0.8, 0.3 to 0.7 or 0.3 to 0.6, b is 0 to 0.5, 0 to 0.4, 0 to 0.3 or 0 to 0.2, c is 0 to 0.8, 0.1 to 0.7, 0.1 to 0.65, 0.1 to 0.6 or 0.1 to 0.5 , d may be 0 to 0.5, 0 to 0.4, 0 to 0.3 or 0 to 0.2.
• c / (c + d) may be 0.3 or more, 0.5 or more, 0.65 or more, or 0.7 or more.
• the upper limit of c / (c + d) is not particularly limited and may be, for example, 1, 0.9, 0.8 or 0.75.
• e represents the amount of a condensable functional group, for example, a hydroxy group or an alkoxy group, contained in the polyorganosiloxane.
• e is 0 or a positive number.
• e / (c + d) may be present in a range of 0.2 or less, 0.15 or less, 0.1 or less, or 0.05 or less.
• Such tackifiers may, for example, have a molecular weight of 500 to 20,000 or 500 to 10,000.
• the tackifier when included in the composition, for example, it may be included in a ratio of 0.1 parts by weight to 20 parts by weight with respect to 100 parts by weight of the solid content of the curable composition, the content may be appropriately changed in consideration of the desired adhesive improvement effect, etc. Can be.
• the curable composition is 2-methyl-3-butyn-2-ol, 2-phenyl-3-1-butyn-2ol, 3-methyl-3-pentene-1-yne, 3,5-dimethyl as necessary.
• Reaction inhibitors such as 3-hexene-1-yne, 1,3,5,7-tetramethyl-1,3,5,7-tetrahexenylcyclotetrasiloxane or ethynylcyclohexane;
• Inorganic fillers such as silica, alumina, zirconia or titania; Carbon functional silanes having an epoxy group and / or an alkoxysilyl group, partial hydrolysis condensates or siloxane compounds thereof; Thixotropy-imparting agents, such as fumed silica which can be used together with polyether etc .; filler; Phosphor; Conductivity imparting agents such as metal powders such as silver, copper or aluminum, and various carbon materials; Additives, such as a color tone adjuster,
• the present application also relates to a semiconductor device, for example, an optical semiconductor device.
• An exemplary semiconductor device may be encapsulated with an encapsulant including a cured product of the curable composition.
• the semiconductor element encapsulated with the encapsulant include a diode, a transistor, a thyristor, a photocoupler, a CCD, a solid state image pickup element, an integrated IC, a hybrid IC, an LSI, a VLSI, a light emitting diode (LED), and the like.
• the semiconductor device may be a light emitting diode.
• the light emitting diode etc. which were formed by laminating
• the semiconductor material may include GaAs, GaP, GaAlAs, GaAsP, AlGaInP, GaN, InN, AlN, InGaAlN, or SiC, but are not limited thereto.
• the substrate sapphire, spinel, SiC, Si, ZnO, or GaN single crystal may be exemplified.
• a buffer layer may be formed between a board
• GaN or AlN may be used.
• the method of laminating the semiconductor material on the substrate is not particularly limited, and for example, the MOCVD method, the HDVPE method, or the liquid phase growth method can be used.
• the structure of the light emitting diode may be, for example, a monojunction having a MIS junction, a PN junction, a PIN junction, a heterojunction, a double heterojunction, or the like.
• the light emitting diode may be formed in a single or multiple quantum well structure.
• the light emission wavelength of the light emitting diode may be, for example, 250 nm to 550 nm, 300 nm to 500 nm, or 330 nm to 470 nm.
• the emission wavelength may mean a main emission peak wavelength.
• the light emitting diode may be encapsulated using the composition.
• the encapsulation of the light emitting diode may be performed only with the composition, and in some cases, another encapsulant may be used in combination with the composition.
• another encapsulant may be used in combination with the composition.
• an epoxy resin, a silicone resin, an acrylic resin, a urea resin, an imide resin, glass, etc. are mentioned.
• the composition is pre-injected into a mold form die, a lead frame having a light emitting diode fixed thereto is immersed therein, and a method of curing the composition and a light emitting diode is inserted.
• the method of injecting and curing the composition in one form can be used.
• injection by a dispenser, transfer molding or injection molding may be exemplified.
• the composition is added dropwise onto a light emitting diode, applied by stencil printing, screen printing or a mask, and cured, the composition is injected into a cup or the like having a light emitting diode disposed at the bottom by a dispenser or the like. Curing method and the like can be used.
• the curable composition may be used as a die-bonding material for fixing the light emitting diode to a lead terminal or a package, a passivation film or a package substrate on the light emitting diode.
• the curing method is not particularly limited, and for example, it is carried out by holding the composition for 10 minutes to 5 hours at a temperature of 60 °C to 200 °C, or two steps at an appropriate temperature and time A step hardening process can also be advanced through the above process.
• the shape of the sealing material is not particularly limited, and can be formed, for example, in the form of a shell lens, a plate or a thin film.
• a method for improving the performance for example, a method of providing a light reflection layer or a light collecting layer on the back surface of a light emitting diode, a method of forming a complementary coloring part at the bottom, and providing a layer on the light emitting diode that absorbs light having a wavelength shorter than the main emission peak
• the method etc. are mentioned.
• the optical semiconductor for example, a light emitting diode
• a light emitting diode may be, for example, a backlight of a liquid crystal display (LCD), an illumination, various sensors, a light source such as a printer, a copier, a vehicle instrument light source, a signal lamp, an indicator light, It can be effectively applied to a display device, a light source of an area light emitting body, a display, a decoration or various lights.
• LCD liquid crystal display
• Exemplary curable compositions can provide a cured product that is excellent in processability, workability, adhesion, and the like, and does not cause cloudiness, stickiness on the surface, or the like.
• the curable composition may also provide a cured product excellent in transparency, moisture resistance, mechanical properties, crack resistance, and the like, and thus, for example, may be applied to various electronic devices to exhibit excellent long-term reliability.
• curable composition will be described in more detail with reference to Examples and Comparative Examples, but the scope of the curable composition is not limited by the following examples.
• Vi, Ph, Me and Ep represent a vinyl group, a phenyl group, a methyl group and a 3-glycidoxypropyl group, respectively.
• Device characteristics are evaluated using a 7020 LED package made of polyphthalamide (PPA).
• the curable composition is dispensed into a polyphthalamide cup, cured by holding at 60 ° C. for 1 hour and at 80 ° C. for 1 hour, and then again at 150 ° C. for 4 hours to prepare a surface mounted LED. Thereafter, the manufactured LED was operated for 500 hours while flowing a current of 70 mA while maintaining the temperature at 85 ° C. Subsequently, the luminance reduction rate after the operation compared to the initial luminance before the operation is measured and evaluated based on the following criteria.
• the number of LEDs not lit after holding the LEDs at 300 cycles was evaluated by maintaining the LEDs at -40 ° C for 15 minutes and again at 100 ° C for 15 minutes to evaluate the total number of LEDs. . Specifically, after evaluating a total of 20 LED packages, the evaluation was performed based on the number of cases in which no lighting was made or the lighting state was poor.
• the compounds represented by the following formulas (A) to (D) prepared by a known method are mixed to prepare a mixture (mixture amount: formula A: 30 g, formula B: 70 g, formula C: 19 g, formula D: 2.0 g), respectively. Subsequently, a catalyst (Platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane) was added to the mixture so that the content of Pt (0) was 2 ppm, to prepare a curable composition.
• a catalyst Platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane
• a curable composition was prepared in the same manner as in Example 1, except that 23 g of the compound of formula E was used instead of the compound of formula C.
• a curable composition was prepared in the same manner as in Example 1, except that 20 g of the compound of Formula E and 2 g of the compound of Formula F were used instead of the compound of Formula C.
• a curable composition was prepared in the same manner as in Example 1, except that 20 g of the compound of Formula E and 2 g of the compound of Formula G were used instead of the compound of Formula C.
• a curable composition was prepared in the same manner as in Example 1, except that 80 g of the compound of Formula B was used without using the compound of Formula A.
• a curable composition was prepared in the same manner as in Example 2, except that 100 g of the compound of Formula A was used without using the compound of Formula B.
• a curable composition was prepared in the same manner as in Example 2, except that only 300 g of the compound of Formula A was used without using the compound of Formula B.
• the compounds represented by the following formulas (A) to (D) prepared by a known method are mixed to prepare a mixture (mixture amount: formula A: 30 g, formula B: 70 g, formula C: 19 g, formula D: 2.0 g), respectively. Subsequently, a catalyst (Platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane) was added to the mixture so that the content of Pt (0) was 2 ppm, to prepare a curable composition.
• a catalyst Platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane
• the compounds represented by the following formulas (A) to (D) prepared by a known method are mixed to prepare a mixture (mixture amount: formula A: 30 g, formula B: 70 g, formula C: 19 g, formula D: 2.0 g), respectively. Subsequently, a catalyst (Platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane) was added to the mixture so that the content of Pt (0) was 2 ppm, to prepare a curable composition.
• a catalyst Platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane

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